Hot-blast stove



(No Model.) 2 Sheets-Sheet 1.

J. L. HUNTER.

HOT BLAST STOVE.

No. 386,635. Patented July 24, 1888.

witnesses N. PEYERS. PllohrLllhugnphur. Washivlglun, D: C.

2 Sheets-Sheet 2.

J. L. HUNTER.

HOT BLAST STOVE.

(No Model.)

Rm 2 oo 0 M 8 t v 1 m 4 W m A W /1 1 I p X l x 2 i -Q! 9 Witnesses.

N. PETERS. Phohrlilhugflpher, Waihingion. D. c.

UNITED STATES PATENT OFFICE.

JOSEPH L. HUNTER, OF PITTSBURG, PENNSYLVANIA.

HOT-BLAST STOVE.

SPECIFICATION forming part of Letters Patent No. 386,635, dated July 24, 1888,

(No mode.)

T0 on whom it may c0ncern:

Be it known that I, JOSEPH L. HUNTER, of the city of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Hot-Blast Stoves; and I do hereby declare the following to bea full, clear, and exact description thereof, reference being had tothe accompanying drawings, forming part of this spcci fieation, in which- Figure 1 is a vertical sectional view of my improved hot-blast stove. Fig. 2 is a crosssection on the line so a: and y y of Fig. 1. Fig. 3 is a cross section on the line .2 of Fig. 1.

Like letters of reference indicate like parts in each.

I will now describe my invention, so that others skilled in the art to which it appertains may manufacture and use the same.

In the drawings, A represents the outer shell built of brick-work, having an outer casing of iron. On top of this wall A is a dome, B, built of the bricks b and the metal girders b, the whole being covered with the metal cas ing, the same as that over the wall A. The keystone of the brick dome is an annular ta pered cylinder, G, formed of fire clay, which forms a flue leading into the cupola D, situate on top of the dome and formed of metal or any other suitable material.

\Vithin the shell A are the vertical parti tions 6 e, which form the heating-fines ol' the stove, and in the center of the stove is the circular partition f, which forms a larger dustcollecting flue. These partitions are built planes below the dome, whereby the space E is formed at the top of the stove. The upper end of the dust-fluefis situate directly below the cylinder 0, and the mouth of the flue is flared outwardly, so as to form a combustioir chamber and dust-catcher, F. At the base of the fluefis a horizontal dust-fluef. In the side of the flue f, at the base thereof, is an opening, y, leading into the space h, communicating with the stack, which opening is of about the same diameter as that of the heatiug-flue. The purpose of this opening is to induce a draft sufficient to draw the dust down the dust-flue.

The stove is provided with the usual air, gas, and blast mains and valves.

The cylinder 0, owing to its tapered form and extension into the cupola D, permits the dome to expand and contract without injury to the masonry.

Having thus described my invention,whatI claim, and desire to secure by Letters Patent, 1s-

1. In a hot-blast stove, a vertical dust-flue situate below the gas-inlet and having a flared mouth, substantially as and for the purpose specified.

2. In a hot-blast stove, a vertical dust-flue situate below the gas-inlet and having an opening at the base leading to the stack-flue and of about the same relative diameter as the heatingflues, substantially as and for the purpose specified.

In testimony whereof I have hereunto set my hand this 10th day of June, A. D. 1887.

.105. L. HUNTER.

\Vitnesses:

R. H. WHITTLEsEY, JAMES K. BAKEWELL. 

